Lathe.



Z. MCALEXANDER.

LATHE.

APPLICATION man AUG.3I 1915.

li5. TE i ZACRY MGALEXANDER, OF COLLINS, MISSISSIPPI.

LATHE.

Application filed August 31, 1915.

T0 all w/wm z'z5 may concem:

Be it known that I, ZACRY MCALEXANDER, 21 citizen 0f the United-States, residing at Collins, in the county of Covington and Stute of Mississippi, have invented new am]. useful Improvements in Lathes, of which the following is a specification.

The invention relates to a pin lathe for turning locomotive or stationarypins, be ing directed to a portable structure Whioh may be readily connected to the pin and which may be operated to turn the pin to the desired extent.

The improved pin lathe is constructed with a view to permitting its ready assemblage and operation in conjunction with pins o:f the locomotive or stationary engines, and other purposes, the feed of the tool being automatic and the parts capable of adjustment to limit the feed at any desired point in order that shoulders 01 offsets on the engine pin may be properly turned down.

The invention in the preferred form of details will be described in the following specification, reference being had particularly to the acoompanying dmwings, in which:

Figure 1 is a v1ew in elevation of the improved lathe; Fig. 2 is a longitudinal centra1 section of the same; Figs. 3, 4 and 5 are transverse sections 011 lines 33, 44, and 5-5, respectively-of Fig. l; Figs. 6 and 7 show a view in elevation of each of two types of bushings used with the lathe. Fig. 8, represents a collar designed to be applied to the main pin of a locomotive.

The improved pin lathe comprises a spindle 1 formed at one end With a short bore 2 interiorly threaded at 3 for connection With ehe WOI'k to be operated upon, as will late'r appear. The opposite end of the spindle has an angular projection 4 for the application of the spindle to the work. The spindle is exteriorly threaded at 5 for a portion 0]": its length from the free end, th e main body 6 in the form of a sleeve like member is arranged to loosely encircle the spindle. The Wall of the main body is formed With a longitudinally extending recess opening through the inner side of the Wall in Which is seated a block 8 operated through the medium 0:E a screw 9 threaded through the body and extending beyond the outer surfaoe thereof, the block 8 aeting as a take up for the main body of the spindle in the event of wozu.

Threaded upon the opposite ortion of Speeification of Letters Patent.

Patented May 23, wir

Serial N0. 48,283.

the spindle is a feed nut 10 having an annular oflset 11 to be engaged by the annular in wardly extending ledge 12 0f the holding nut 13 having threaded oonnection at 14 with the body. A feed pin 15 .is operative through the feed nut, und adapted to sea1: in a recess 16 in the end of the body whereby the feed nut und body may be locked together for simultaneous rotation, or freed from such connection When desired. A jam-nut 17 is also arranged upon the threaded portion 5 of the spindle for a purpose Which Will later appear. The body is formed with a longitudinally extending channel 18 in whioh through the medium of screw 19 is set a autter head post 20. The post 20 has a head 21 to slida'bly receive a cutter head 25, the comnection being through the medium of a projection 22 formed on the head 21 and having nndercut Walls und a coperating slot 23 formed in the cutter head. The outter head 25 is formed with an overhang 24 above the slotted portion, the post head and cutter head being adjustably connected by a screw 26 threaded through the overhang and into the projection 22. The cutter head projeots beyond the post head and is formed With a transverse opening 27 in whioh through any suitable appropriate construction is arranged a tool post 28 for supporting the appropriate tool 29. Seoured upon thedoody is an operating handle 30 whereby the body may be rotated.

31 represents a double end bushing by Whioh the spindle Which may be secured to the pin of a locomotive and securely hold i;he}1;eon to permit proper operation of the at e.

33 represents a different type of bushing, inoluding a cap sorew 34, used in securing the spindle 110 stationary engines 01 any short '-bearing.

35 represents a thick collar designed to be applied to tl1e main pin of a locomotive for the machine 130 screw up against, while 36 represents a channeled place designed to be applied between the outer head post and tho body to spaoe the post from the spindle to the desired extent to accommodate diflerent size pins to be operated upon.

From the above description it is apparent filmt with the parts oonstruoted and arranged as desoribed the rotation of the body by means of the handle 30 Will drive the 13001 with obvious effect upon the Werk, the said nut imparting the necessary longitudinal movement er :Eeed to the body anal tool. In the event a shoulder or recess is found in the work being operated 011, it is desirable to rotate the 13001 in one position that is to say Without longitudinal movement, the pin 15 is (lisconnected from the body anal the jamb nut screwed 011 t0 preveni; ehe saicl nut advancing. The bocly 1nay be 110W rotated without Ehe advance movement and the autter heacl moved as clesired raclially 0f the bocly to cause the tool 130 ricle up und down the surface to be operatecl upon.

It is am3arent that the improvecl pin lathe nmy be usecl in a great variety of situations and while primarily clesignecl as a portable lathe for operating upon locomotives und stationary engine ins it is to be understood that any und all uses are contemplated within the scope of the invention.

Oopies 01 this patent may be obtained 1'or nel plate resting upon the body, a cutter' l1eacl ost slidably mountecl in 'the channel plate ancl rernovably secured to said plate ancl botly, ancl an operating handle secured directly to the body.

In testimony whereof I allix mjsignature in presence of two witnesses.

' ZACBY MCALEXANDER. VVitnesses J. M. Rnss, J. NILEY TI-IAMES.

five cents each, by addressing the Commissioner 01 Iacenh, Washington, D. G. 

